Rotation device for fluid-pressure-operated hammer-tools.



A. H. TAYLOR. ROTATION DEVICE FOR FLUID PRESSUR OPERATED HAMMER TOOLS.

APPLIGATION FILED AUG. 6 1909.

Patented July 25, 1911.

Ev m W E W n h R m. y \E Q uaN WNW X MN \N W. wl mk w E t 7 ,F N a ALBERT H. rhyme, or nAs'roN, rnnnsvrva vm, assrenoa 'ro INGERSOLL-RAND COMPANY. or new Yuan, N. Y., A conroaarron or new JERSEY.

I ROTATTQN DEVICE FOR FLUID-PRESSURE-OPERATED HAMMER-TOOLS.

as egpecifi cation of Letters Patent. Application filed August 6, 1909. Serial No. 511,551.

Patented July 25, 1911,.

To all whom'it may concern: 1

Be it'kiio'w'n thatT, AISBERT H. TAYLOR, a

. citizenottheUnite'd States, and resident of 'Easton, in theco'unt'y" of Northampton and"State'of Pennsylvania; have invented a new'and useful Improvement 'in Rotation .DeVices for Fluid-Pressure-Operated Ham mer-Tools, of which thefollow-ing'is a s'p'ecificationl This invention has for its object to provide certain improvements"in the"constru'c'- ent of the hammer pi sto'n br'its operating.

' mechanism andwhich will be positive in its motionf In-the accompanying drawings, Figure 1 represents partly in side elevation and partly in longitudinal centralsection so much of a hamine r tool as will give a clear understanding or theconstructionflocation and operation of improved rotation devic'e,"F1g. 2 is a transverse section taken 1n the plane of the line A A of'Fig. 1, Fig. 3

is a transverse section taken inthe plane of the line B B of Fig. dis a' ldngitudinal section taken in the plane of the line CC of Fi 1',wit'h the movableparts at "the limit oft 'eir mo'vementin one direc tion, and Fig. 5 is a similar viewwit'h the parts at the limit of their movement in the Opposite direction.

The cylinder 1 of the tool is provided with a piston hammer 2 and an anvil block'3.

A valve casing 4 is provided for the front end'of'the cylinder 1, which'casin'g is fixedly secured to the cylinder as, for instance, by a cross pin 5.

A front plate 6 is secured to the outer end of the casing 4. The shank 7 of the tool steel extends throughthe chuck 8 into engagement with the anvil block 3. This chuck 8 is shown herein as being rotatably mounted within the front plate 6 and the .front end of the cylinder 1. An oscillating ring 9 is mounted in the valve casing 4 around an enlarged portion of the chuck 8.

Any suitable device may be employed for clutching and releasing the chuck andoscillating ring, that shown herein being of the roller clutch type, the rollers being denoted by 10. The front late 6 serves to retain the rollers and oscil ating ring in position. Larger and smaller transversely arranged cylindrical chambers 11'and 12 are provided in the valve casing 4 and the os;'- cillating ring 9' is provided with an arm 13 which projects through a slot 14 intothe cylindrical chamber 11, A pin 15 carried bythe arm '13 projects through a slot- 16 into the. smaller cylindrical chamber 12. Pistons l7 and 18 are located within the cylindrical chamber 11 upon' opposite sides of'th'arin 13 ofthe rotation" ringf. Caps 19 and 20 screwed into the opposite ends of the'cyl'indrical chamber 11 serve to limit-"the outward movements of the pistons 175, 18. I v

A." valve 21 isfitte'd to reciprocate in the cylindrical chamber 12. Caps; 22 23,

screwed into the opposite ends of the cylindrical chamber 12 serve to limit the movements of the valve 21. Ports 24, .25, lead from the opposite ends. ofthe chamber 11 into the opposite ends of the chamber 12 and ports 26, 27{l ead from the opposite ends of the chamber 12 to ei'zternal atmosphere.

The valve 21 is (provided, adjacent to its ends, with. reduce" portions forming circumferential port's 28,29, which are at all tindes in open communication with the source ofm'otive' fluids'iipply independent of the hammerfpis't'on 2 and its operating mechan1sm,"-thro'ulgh branch ports'30, 31', leading from alongitudinalpassage 32 in the wall of thecyhfgiderl; Thevalve 2l has a. lostmotio'n tidn'nection with theiarm 13'of the oscillat'ing flag the body of the veivegpwat as elbngated; s1o't33 into which the pr 15,"carried by tharin 13, projects.

In operation, presupposing the parts to be 1n 'the ldflsllllbn' 1n"which"they are -shown in Fig'sf1,--2,.3, and 4, the valve 21 is in such a position "that the motive fluid which enters the port 28 is cut oil." from escape while the motive fluid which enters the port 29 passes through the port to the outer side of the piston-18. This will force the piston 18 toward the limit of its inward movement, causlng it to rock the arm 13 of the rotation ring and through the arm to move the piston 17 to the limit of its outward movement, the space beyond the piston 17 being in open communication with the external atmosphere through the ports 24 and 26. As the clutch is herein represented, this movement of the oscillating ring 9 will not rotate the chuck 8. As the arm 13 approaches the limit of its movement," its pin 15 moves the valve 21 to the limit of its movement in the opposite direction, viz: that shown in Fig. 5. This movement of the valve 21 will shut off the flow of the motive fluid leading through port 29 and open the motive fluid leading through port 28 to the outer slde of the piston 17 through the port 24 thus causing the P l l piston 17 to move inwardly thereby rocking the arm 13 of the oscillating ring 9 and through it moving the piston 1.8 back to its original position. As the piston 17 nears the limit of its inward movement the pin 15 carried by the arm 13 will be caused to move the valve 21 back to its original position. Durl ing this return movement of the oscillating ring, it will be clutched to the chuck 8 by the l rollers 10 and thereby rotate the chuck and thus the tool steel 7.

lVhen the parts are in the position shown in Fig. 5, the space in front of the piston 18 is open to external atmosphere through the ports 25 and 27. It Will be furthermore seen that the ports 26 and 27 in the valve chamber 12 are alternately covered by the opposite ends of the valve 21 during its reciproc'atory movements.

hat I claim is 1. In a fluid pressure operated hammer tool. a tool steel and fluid pressure actuated mechanism independent of the hammer piston and its operating mechanism for rotating it comprising an oscillating ring, a valve and a pair of pistons controlled thereby for operating the oscillating ring.

In a fluid pressure operated hammer tool, a tool steel, an oscillating ring for rotating it," a valve. a pair of pistons controlled thereby for operating the oscillating ring and means carried by the oscillating ring for positively moving the said valve.

3. In a fluid pressure operated hammer tool, a tool steel, an oscillating ring for rotat ing it, a valve, a pair of pistons controlled thereby for operating the oscillating ring and a pin projecting from the oscillating ring into engagement with said valve for positively moving it.

4. In a fluid pressure operated hammer. tool, a tool steel, an oscillating ring for rotating it, a valve and a pair of pistons actuated independently of-the hammer piston and its operating mechanism for operating the oscillating ring and means carried by the oscillating ring for positively moving the said valve.

5. In a fluid pressure operated hammer tool. a tool steel, an oscillating ring for rotat ing it, a valve and a pair of pistons actuated independently of the hammer piston and its operating mechanism for operating the oscillating ring and a pin projecting from the oscillating ring into engagement with said valve for positively moving it.

6. In a fluid pressure operated hammer tool, a transversely arranged piston chamber, a pair of pistons therein, a valve for controlling the reciprocating movements of the pistons, a tool steel, an oscillating ring for rotating the steel, having an arm projecting into the. piston chamber between said pistons and means carried by the oscillating ring for positively movingsaid valve.

7, In a fluid pressure operated hammer tool, a transversely arranged piston chamber. a pair of pistons therein. a transversely arranged valve chamber, a valve therein for controlling the reciprocating movements of the pistons, a tool steel, an oscillating ring for rotating the steel having an arm projecting into the piston chamber between the said pistons and a pin projecting from said arm into the valve chamber for positively moving the piston controlling valve.

In testimony, that I claim the foregoing as my invention, I have signed my name in presence of two Witnesses. this fourth day of Au gust, 1909.

ALBERT H. TAYLOR. lVitnesses:

Venn RAYMoNI), Rnssnm. H. W'ILHELM.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents.

Washington, D. G. 

